Sennheiser HD 280 PRO Closed-Back Headphones The HD 280 Pro is Sennheiser's most significant closed, around-the-ear headphone to be introduced in years. Designed to exceed the demands of the professional environment, the HD 280 Pro boasts extremely robust construction combined with the sound quality, modular design and aggressive noise isolation the necessary in the field. The unique collapsible design, combined with swiveling ear cups, offers maximum flexibility in any application. True-to-detail linear reproduction Ergonomic design with collapsible, rotatable earcups High attenuation of external noise The package includes: Sennheiser HD 280 PRO Headphones, 1/4" stereo plug adapter